Developer Tools
Free online developer utilities. Format JSON, encode/decode data, generate UUIDs, test regex, and more.
JSON Formatter
Format and validate JSON online for free. Pretty print, minify, and validate JSON with error highlighting.
Base64 Encoder / Decoder
Encode and decode Base64 online for free. Text to Base64 and Base64 to text.
URL Encoder / Decoder
URL encode and decode online for free. Encode special characters for URLs or decode percent-encoded strings.
UUID Generator
Generate UUIDs online for free. Create random UUID v4 identifiers. Generate single or batch UUIDs.
Password Generator
Generate strong passwords online for free. Customize length and character sets. Includes strength meter.
Hash Generator
Generate cryptographic hashes online for free. MD5, SHA-1, SHA-256, SHA-512. All computed locally in your browser.
JWT Debugger
Decode and debug JWT tokens online for free. View header, payload, and signature.
HTML Entity Encoder / Decoder
Encode and decode HTML entities online for free. Convert special characters to HTML entities and back.
Regex Tester
Test regular expressions online for free. Real-time matching with highlighting, capture groups, and flag support.
CSS & JS Minifier
Minify CSS and JavaScript online for free. Reduce file size for production. Shows original vs minified size.